Feat/visual watchdog (#673)

* feat(Watchdog): Add visual indication for watchdog reset (it also blocks the system)

* chore: Add changeset

Author: FoniksFox

.changesets/visual-watchdog.md

@@ -0,0 +1,2 @@
+release: minor
+summary: Makes the watchdog reset check block the system and have a visual indication similar to hardfault

Inc/HALAL/HardFault/HardfaultTrace.h

@@ -11,6 +11,9 @@ extern "C" {
 #endif
 extern uint8_t _metadata[];
 extern uint8_t _hf_log[];
+extern GPIO_TypeDef* ports_hard_fault[];
+extern uint16_t pins_hard_fault[];
+extern uint8_t hard_fault_leds_count;
 #ifdef __cplusplus
 }
 #endif

Inc/HALAL/Services/Watchdog/Watchdog.hpp

@@ -41,12 +41,7 @@ class Watchdog {
     }
 
     static void refresh() { HAL_IWDG_Refresh(&watchdog_handle); }
-    static void check_reset_flag() {
-        if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDG1RST)) {
-            reset_by_iwdg = true;
-        }
-        __HAL_RCC_CLEAR_RESET_FLAGS();
-    }
+    static void check_reset_flag();
     template <typename TimeUnit> Watchdog(chrono::duration<int64_t, TimeUnit> period) {
         watchdog_time = std::chrono::duration_cast<std::chrono::microseconds>(period);
     }

Src/HALAL/Services/Watchdog/Watchdog.cpp

@@ -1,6 +1,77 @@
 #include "HALAL/Services/Watchdog/Watchdog.hpp"
+#include "HALAL/HardFault/HardfaultTrace.h"
 
 IWDG_HandleTypeDef watchdog_handle;
 std::chrono::microseconds Watchdog::watchdog_time =
     std::chrono::microseconds(1000000); // 1 second by default
 bool reset_by_iwdg{};
+
+#ifdef NUCLEO
+#define WDG_REPS 200000
+#endif
+#ifdef BOARD
+#define WDG_REPS 800000
+#endif
+
+__attribute__((optimize("O0"))) static void wdg_delay() {
+    for (uint32_t i = 0; i < WDG_REPS; i++) {
+        __NOP();
+    }
+}
+
+static void wdg_enable_gpio_clock(GPIO_TypeDef* port) {
+    if (port == GPIOA)
+        LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOA);
+    else if (port == GPIOB)
+        LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOB);
+    else if (port == GPIOC)
+        LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOC);
+    else if (port == GPIOD)
+        LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOD);
+    else if (port == GPIOE)
+        LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOE);
+    else if (port == GPIOF)
+        LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOF);
+    else if (port == GPIOG)
+        LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOG);
+    else if (port == GPIOJ)
+        LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOJ);
+    else if (port == GPIOK)
+        LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOK);
+}
+
+static void wdg_init_gpio_output(GPIO_TypeDef* port, uint16_t pin) {
+    LL_GPIO_SetPinMode(port, pin, LL_GPIO_MODE_OUTPUT);
+    LL_GPIO_SetPinOutputType(port, pin, LL_GPIO_OUTPUT_PUSHPULL);
+    LL_GPIO_SetPinSpeed(port, pin, LL_GPIO_SPEED_FREQ_LOW);
+    LL_GPIO_SetPinPull(port, pin, LL_GPIO_PULL_NO);
+}
+
+static void wdg_led_init() {
+    for (int i = 0; i < hard_fault_leds_count; i++) {
+        wdg_enable_gpio_clock(ports_hard_fault[i]);
+        wdg_init_gpio_output(ports_hard_fault[i], pins_hard_fault[i]);
+    }
+}
+
+__attribute__((optimize("O0"))) void Watchdog::check_reset_flag() {
+    if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDG1RST)) {
+        reset_by_iwdg = true;
+    }
+    __HAL_RCC_CLEAR_RESET_FLAGS();
+
+    if (reset_by_iwdg) {
+        if (hard_fault_leds_count == 0U) {
+            while (1)
+                ;
+        }
+        wdg_led_init();
+        while (1) {
+            for (int i = 0; i < hard_fault_leds_count; i++) {
+                LL_GPIO_SetOutputPin(ports_hard_fault[i], pins_hard_fault[i]);
+                wdg_delay();
+                LL_GPIO_ResetOutputPin(ports_hard_fault[i], pins_hard_fault[i]);
+            }
+        }
+    }
+}